Sleep and circadian rhythm characteristics in individuals from the general population during the French COVID-19 full lockdown.

J Sleep Res

Département de Psychiatrie et D'Addictologie, AP-HP, GHU Paris Nord, DMU Neurosciences, Hôpital Bichat-Claude Bernard, Paris, France.

Published: April 2022

The full 2-month lockdown to fight the coronavirus disease 2019 (COVID-19) pandemic in 2020 led to substantial disruption of daily life and routines. The present study aimed to comprehensively identify the lockdown's effects on sleep, daily rhythms and emotions of the French population. A survey was published online during the last week of the 2-month full lockdown and 1,627 individuals completed the online survey. The survey was self-administered and included standardised questionnaires. Sleep schedules were delayed during lockdown in more than half of the participants. New severe delayed sleep phase affected 10% of participants with sleep schedules delayed by ≥3 hr during the lockdown compared to before. A significant decrease in exposure to morning (p < 0.001) and evening natural light (p < 0.001), a significant increase in screen exposure time (with a significant screen exposure >3 hr during the evening for 45% of the participants during lockdown versus 18% before lockdown, p < 0.001), an increase in substance use for one-quarter of participants, a poorer sleep quality in 56% of participants, and less regular sleep schedules in 48% of participants were observed. We also found a poorer sleep quality in women than men during lockdown (p = 0.004). The French full lockdown had a severe impact on sleep quality, sleep-wake rhythms, and sleep behaviours. The implementation of public health strategies for the prevention and care of sleep-wake cycles during lockdown are therefore essential.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8646935PMC
http://dx.doi.org/10.1111/jsr.13480DOI Listing

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